Analysis of ASB assisted failure in a high strength steel under high loading rate

Roux, Émile; Longère, Patrice; Cherrier, Olivier; Millot, Thierry; Capdeville, D.; Petit, J.

doi:10.1016/j.matdes.2015.03.025

Cited by 23 publications

(9 citation statements)

References 19 publications

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“…The objective of this study is to investigate experimentally the crack arrest capability of notched structures made of RT-PMMA under dynamic conditions. Therefore, the edge of double-notched plates are impacted using a method similar to the one proposed by Kalthoff and Wrinkler [9]. All Kalthoff and Wrinkler (KW)-type impact tests were conducted at Institut Clément Ader Lab using gas launchers STIMPACT platform.…”

Section: Experimental Methodsmentioning

confidence: 99%

Crack Resistance of RT-PMMA under Impact Loading

Jali

Longère

2018

The 18th International Conference on Experimental Mechanics

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Analysis of failure mechanisms under high strain rate loading in engineering materials is a key point for the design of structures submitted to accidental overloads. We are here interested in the crack arrest capability under impact loading of polymers used as structural and/or protection materials. In the present work, crack arrest capability is defined by how an engineering structure which is initially weakened by a pre-crack behaves when dynamically reloaded. The Kalthoff and Winkler (KW) impact test, consisting in impacting the edge of a double notched plate, is retained for that purpose. An experimental investigation of the dynamic crack arrest capability of shock-resistant PMMA under high strain rate loading is presented, evidencing the brittle feature of the material failure. A high-speed camera is used to record the chronology of the failure mechanisms. It is notably shown that the higher the impact velocity (in the range 50-100 m/s) the larger the number of fragments. Moreover, depending on the impact velocity, changes in the crack path and thus in the mechanisms controlling the PMMA dynamic fracture can be seen.

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Section: Experimental Methodsmentioning

confidence: 99%

Crack Resistance of RT-PMMA under Impact Loading

Jali

Longère

2018

The 18th International Conference on Experimental Mechanics

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“…In an attempt to understand the failure of metals and alloys under shear-dominated loading, involving thus small stress triaxiality range, two independent experimental studies searched recently for going deeper into interactions between strain localization and damage, see Morgeneyer et al (2014) and Longe`re and Dragon (2015). It has been shown notably in Longe`re and Dragon (2015) that at high strain rate, involving quasi adiabatic conditions, the material failure for Ti-6Al-4V titanium alloy was found to result from the ASB localization followed by microvoids growth along the band -see also Roux et al (2015) for high-strength steel failure under impact loading. The localization prompted failure under high strain rate took place at shear strain smaller compared with maximum strain at low strain rate experiments.…”

Section: Introductionmentioning

confidence: 96%

Enlarged finite strain modelling incorporating adiabatic shear banding and post-localization microvoiding as shear failure mechanisms

Longère

Dragon

2016

International Journal of Damage Mechanics

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The adiabatic shear banding and its consequences are considered here as deterioration mechanisms incorporated in the dynamic plasticity modelling for high-strength metallic materials following earlier contributions of the present authors. A three-dimensional finite deformation model, starting from a specific scale postulate and devoted to cover a wide range of dissipative phenomena including adiabatic shear banding-related material instabilities, is further developed here. The developments concerned are based on recent experimental evidence and include explicitly post-localization void-sheet formation and growth in the wake of a band cluster. The model enlarged in this way allows for a more detailed description of a late pre-failure stage of shear-dominated deformation. Some model calibration and numerical implementation items are discussed.

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“…protection window, requires an evaluation of its crack arrest capability under impact loading. For that purpose, a series of Kalthoff and Winkler (KW)-type impact tests [2][3] has been carried on several grades of RT-PMMA evidencing the role of the rubber nanoparticles concentration, see [4,5]: the higher the nano-particles concentration the higher the resistance to crack propagation.…”

Section: Introductionmentioning

confidence: 99%

Crack arrest and propagation in impact loaded shock resistant PMMA: mesh-free numerical simulation

2021

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The use of shock resistant RT-PMMA in engineering structures potentially subject to accidental overloading requires an evaluation of its crack arrest capability under impact loading. Based on experimental results obtained from a series of Kalthoff and Winkler (KW)-type impact tests, the present study aims at numerically reproducing the conditions for brittle-like crack initiation and propagation in impact-loaded RT-PMMA. For that purpose, three-dimensional SPH numerical simulations were conducted and the performance of various failure criteria was evaluated. The numerical model together with a combination of stress- and strain- dependent failure criteria were shown to fairly reproduce the experimental results in terms of finite crack advance and orientation.

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Analysis of ASB assisted failure in a high strength steel under high loading rate

Cited by 23 publications

References 19 publications

Crack Resistance of RT-PMMA under Impact Loading

Crack Resistance of RT-PMMA under Impact Loading

Enlarged finite strain modelling incorporating adiabatic shear banding and post-localization microvoiding as shear failure mechanisms

Crack arrest and propagation in impact loaded shock resistant PMMA: mesh-free numerical simulation

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